Dual voltage motor

If we take a look at electric motor nameplate,we can see the several important information and specification about electric motor.This time i want explain about dual voltage for power supply.

It is like a simple thing and not so important BUT if we make a mistake about electric motor voltage power supply,it can cause the winding damage and burn out.That why i would like to share about this information to avoid serious damage for electric motor.

The reason why motor manufacture design dual voltage is to make this motor available for any country used because every country have a different voltage value such as 200 VAC,600 VAC and 415 VAC.It also so for marketing strategy to increase their profit margin.

What is dual voltage for electric motor?

Below figure is a electric motor name plate that have a dual voltage.If we can see,it have two connection motor terminal for two voltage for power supply.

please refer to motor nameplate first before connect to power supply.Every electric motor come with different connection and voltage.If you want connect for star delta starter,please make sure the motor is DELTA connection with your voltage power supply

Hi,Thanks for ask a good question.Motor nameplate are difficult to missing or damage,but it’s not possible to happen.Worse case,you can know the motor is single phase voltage (230V) or three phase voltage (460V) from the motor terminal :-

Single phase motor use capacitor to start or running,have 2 terminal connector
Three phase motor not use capacitor,have 3 terminal connector

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